Question

Element of group 17, group 18 and group 1 in the sequence placed in modern periodic table.
(a)Which has -ve electron gain enthalpy?
(b) Which has more metallic behavior?
(c) Which has zero electronic behavior?​

Answer 1

Answer:

a) lithium , sodium potassium

b) no one

c) helium neon argon

Answer 2

Answer:

_ electronic gain enthalpy means energy liberated when an electron is added to the neutral gaseous atom is called electron gain enthalpy also called electron affinity .

electron electron gain enthalpy is occurs in non metals. example l lithium sodium,( b) no one have metallic behaviour. (c): helium , neon ,argon have zero electronic behaviour.